Question

A threatened species among the following is

• A. Only endangered species
• B. Only vulnerable species
• C. Only rare species
• D. All of the above

Answer 1

The correct option is D All of the above

A threatened species includes endangered species, vulnerable species and rare species.

Threatened species are any species. which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate.

Endangered species - a species of animal or plant that is seriously at risk of extinction.

A vulnerable species is one which has been categorised by the International Union for Conservation of Nature as likely to become endangered unless the circumstances threatening its survival and reproduction improve. Vulnerability is mainly caused by habitat loss or destruction.

A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. This designation may be applied to either a plant or animal taxon, and may be distinct from the term endangered or threatened species.

So, the correct answer is option D.